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| author | Vijaya Kumar K <vijay.kilari@gmail.com> | 2013-08-14 14:28:28 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-08-20 01:14:46 +0200 |
| commit | 4f9b4fb7a2091eec339413a460b1665758401828 (patch) | |
| tree | 56755a6a8234cfa647a621bec35b9019def3edc3 /arch/arm/kernel | |
| parent | Merge branch 'security-fixes' into fixes (diff) | |
| download | linux-4f9b4fb7a2091eec339413a460b1665758401828.tar.xz linux-4f9b4fb7a2091eec339413a460b1665758401828.zip | |
ARM: 7815/1: kexec: offline non panic CPUs on Kdump panic
In case of normal kexec kernel load, all cpu's are offlined
before calling machine_kexec().But in case crash panic cpus
are relaxed in machine_crash_nonpanic_core() SMP function
but not offlined.
When crash kernel is loaded with kexec and on panic trigger
machine_kexec() checks for number of cpus online.
If more than one cpu is online machine_kexec() fails to load
with below error
kexec: error: multiple CPUs still online
In machine_crash_nonpanic_core() SMP function, offline CPU
before cpu_relax
Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/machine_kexec.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c index d7c82df69243..57221e349a7c 100644 --- a/arch/arm/kernel/machine_kexec.c +++ b/arch/arm/kernel/machine_kexec.c @@ -82,6 +82,7 @@ void machine_crash_nonpanic_core(void *unused) crash_save_cpu(®s, smp_processor_id()); flush_cache_all(); + set_cpu_online(smp_processor_id(), false); atomic_dec(&waiting_for_crash_ipi); while (1) cpu_relax(); |